这是一个简单的C语言编写的图书管理系统……包括增删查改学生信息，增删查改图书信息，借书，还书，计算逾期罚款等功能。最可用于c语言或数据结构的课程设计-This is a simple C language library management system ... including additions and deletions can change the student information, additions and deletions the investigation chang